US20060257463A1 - Transmucosal delivery of cannabinoids - Google Patents
Transmucosal delivery of cannabinoids Download PDFInfo
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- US20060257463A1 US20060257463A1 US10/516,188 US51618805A US2006257463A1 US 20060257463 A1 US20060257463 A1 US 20060257463A1 US 51618805 A US51618805 A US 51618805A US 2006257463 A1 US2006257463 A1 US 2006257463A1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/0012—Galenical forms characterised by the site of application
- A61K9/0053—Mouth and digestive tract, i.e. intraoral and peroral administration
- A61K9/006—Oral mucosa, e.g. mucoadhesive forms, sublingual droplets; Buccal patches or films; Buccal sprays
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/335—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin
- A61K31/35—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having six-membered rings with one oxygen as the only ring hetero atom
- A61K31/352—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having six-membered rings with one oxygen as the only ring hetero atom condensed with carbocyclic rings, e.g. methantheline
- A61K31/353—3,4-Dihydrobenzopyrans, e.g. chroman, catechin
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K36/00—Medicinal preparations of undetermined constitution containing material from algae, lichens, fungi or plants, or derivatives thereof, e.g. traditional herbal medicines
- A61K36/18—Magnoliophyta (angiosperms)
- A61K36/185—Magnoliopsida (dicotyledons)
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/10—Dispersions; Emulsions
- A61K9/127—Liposomes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/10—Dispersions; Emulsions
- A61K9/127—Liposomes
- A61K9/1271—Non-conventional liposomes, e.g. PEGylated liposomes, liposomes coated with polymers
- A61K9/1272—Non-conventional liposomes, e.g. PEGylated liposomes, liposomes coated with polymers with substantial amounts of non-phosphatidyl, i.e. non-acylglycerophosphate, surfactants as bilayer-forming substances, e.g. cationic lipids
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
- A61K47/08—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite containing oxygen, e.g. ethers, acetals, ketones, quinones, aldehydes, peroxides
- A61K47/10—Alcohols; Phenols; Salts thereof, e.g. glycerol; Polyethylene glycols [PEG]; Poloxamers; PEG/POE alkyl ethers
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
- A61K47/08—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite containing oxygen, e.g. ethers, acetals, ketones, quinones, aldehydes, peroxides
- A61K47/12—Carboxylic acids; Salts or anhydrides thereof
Definitions
- This invention pertains to methods and products for the transmucosal administration of cannabinoids.
- this invention concerns a system for delivering effective dosages of cannabinoids to one's bloodstream.
- THC, THC pro-drugs or THC metabolites or derivatives or analogs thereof may be solubilized in an appropriate solvent and incorporated into the transmucosal preparation.
- Transmucosal matrix film/patch preparations (8% and 16% THC) attained a peak bioadhesive force greater than the same patch preparations without the cannabinoid. Also, the peak force increased statistically (p ⁇ 0.05) with an increase in percentage THC (THC 8% vs. THC 16%).
- THC THC to a subject
- sustained release or a THC pro-drug, the hemisuccinate, for a more immediate release.
- cannabinoids tetrahydrocannabinol
- cannabinol cannabidiol
- cannabinoids cannabinoids
- cannabidiol cannabinoids
- cannabinoid is meant to include Tetrahydrocannabinol (THC), THC pro-drugs or THC metabolites or derivatives or analogs thereof.
- Medicinal uses of cannabis include (A) treatment of nausea associated with cancer and chemotherapy, (B) nausea, pain and other complications of AIDS, such as wasting syndrome; (C) glaucoma; (D) migraines; (E) rheumatic and osteo-arthritis; (F) muscle dysfunction associated with multiple sclerosis; (G) alcohol and other chemical dependence withdrawal symptoms; (E) extreme stress; (I) depression; (J) asthma; and (K) epileptic seizures [3-9].
- A treatment of nausea associated with cancer and chemotherapy
- B nausea, pain and other complications of AIDS, such as wasting syndrome
- C glaucoma
- D migraines
- E rheumatic and osteo-arthritis
- F muscle dysfunction associated with multiple sclerosis
- G alcohol and other chemical dependence withdrawal symptoms
- E extreme stress
- I depression
- J asthma
- K epileptic seizures
- Hot-melt extrusion has been used in the production of different dosage forms and systems for just over a decade [10-15]. It has been demonstrated to be applicable to various dosage forms including granules, pellets, and tablets and has also provided numerous advantages in the production of films for both drug delivery and wound care applications. Hot-melt extrusion technologies offer numerous advantages over traditional methods. These include shorter and more efficient processing times to a final product, environmental advantages due to elimination of solvents in processing, and increased efficiency of drug delivery to the patient.
- Thin films for transdermal/transmucosal (TD/IT) drug delivery devices and wound care applications are frequently produced via film casting utilizing organic or aqueous solvents.
- Aitken-Nichol, et al. [15] noted numerous disadvantages accompanying these techniques including long processing times and high costs.
- Gutierrez-Rocca, et al. in the study of cast films [16] demonstrated that the attainment of stable mechanical properties might be as long as two months, which ultimately affects the rate of release of drugs incorporated into the films.
- this invention demonstrates that a stable film with good cannabinoid bioavailability can be attained for transmucosal delivery via a solvent cast technique.
- U.S. Pat. No. RE 33,093 to Schiraldi et al. describes a bioadhesive hot-melt extruded film for intra-oral drug delivery and the processing thereof.
- the film of Schiraldi et al. comprises essentially a bioadhesive layer consisting of 40-95% by weight of a hydroxypropylcellulose (HPC) having a molecular weight above 100,000, 5-60% of a homopolymer of ethylene oxide (PEO) 3,000,000 to 5,000,000, 0-10% of a water-insoluble polymer, a medicament and 2-10% of a plasticizer.
- HPC hydroxypropylcellulose
- PEO ethylene oxide
- no other bioadhesives are included in this patent (i.e. acrylic acid derivatives).
- the films could not be processed at molecular weights for HPC below 100,000 and for PEO, below 3,000,000.
- the film was made by a hot-melt extrusion process.
- Mooney, et al. U.S. Pat. No. 6,072,100
- Mooney, et al. also describe a medicament delivery system consisting of HPC, PEO, a water-soluble polymer derived from acrylic acid, a medicament and a plasticizer.
- the compositions were intended for topical or transdermal delivery only.
- Gurtler, et al. U.S. Pat. No. 5,773,021 teaches the development of a bioadhesive ophthalmic insert.
- the ophthalmic insert requires the presence of a water-insoluble polymer.
- transdermal route of administration has been disclosed in a U.S. patent as indicated above
- an endeavor of the present invention is to extend the medicinal use of cannabinoids through the use of an effective transmucosal route of administration.
- hot-melt extrusion, hot-melt molding, admixing and solvent casting of a transmucosal device are of interest.
- THC The primary active ingredient of cannabis is THC, which is effective at relatively low doses.
- THC Due to its high lipophilicity, THC exhibits a strong tendency to bind to tissue and protein—thus making the discussed transmucosal applications plausible routes of delivery. Furthermore, mHC is rapidly metabolized in the body, such that concentration levels of the chemical in the bloodstream decreases rapidly if administered through inhalation methods.
- a transmucosal application in contrast to inhalation methods allows for smaller dosages of THC to be administered over an extended period of time, thereby allowing the concentration levels of the drug in the blood stream to remain relatively constant.
- the smaller doses of the transmucosal route reduce the potential for abuse.
- the present invention comprises a transmucosal device, such as, but not limited to, an intra-oral, labial or buccal patch, strip, covering, or related assembly of materials to deliver THC or other cannabinoids in a predetermined period of time.
- a transmucosal device such as, but not limited to, an intra-oral, labial or buccal patch, strip, covering, or related assembly of materials to deliver THC or other cannabinoids in a predetermined period of time.
- One purpose of the structure or method is to allow for controlled delivery of the active chemicals, such that plasma levels of the chemicals may be controlled in a safe, convenient and effective manner for the patient.
- This invention also comprises the method of treating a patient with a transmucosal cannabinoid-containing preparation. Most conveniently, this is accomplished by application of the transmucosal structure described herein. Additional steps for increasing the permeability of the patient's mucosa may further comprise the method for transmucosally applying cannabinoids, such as the permeability enhancement of PEG 400 and/or other enhancers in which cannabinoids may be solubilized.
- cannabinoids such as the permeability enhancement of PEG 400 and/or other enhancers in which cannabinoids may be solubilized.
- Solubilizers (which may inherently be penetration or absorption enhancers) useful in the present invention include, for example, Polyethylene glycol (PEG), Propylene glycol, Dibutyl subacetate, Glycerol, Diethyl phthalate (phthalate esters), Triacetin, Citrate esters-triethyl citrate (TEC), Acetyltriethyl citrate (ATEC), tributyl citrate (TBC), acetyltributyl citrate (ATBC), Benzyl benzoate, Sorbitol, Xylitol, Miglyol (Glycerides), bis(2-ethyllhexyl) adipate, Mineral Oil, polyhydric alcohols such as glycerin and sorbitol, glycerol esters such as glycerol, triacetate; fatty acid triglycerides such as NEOBEE* M-5 and mineral oil, vegetable oils such as castor oil, etc., polyoxy
- the invention includes a transmucosal preparation wherein said transmucosal preparation is made by incorporating an effective amount of a cannabinoid by solubilizing or dispersing the cannabinoid into the transmucosal cannabinoid-containing preparation.
- the transmucosal preparation may be produced via hot-melt extrusion, hot-melt molding, admixing or utilizing a solvent cast technique.
- the invention may include a matrix patch or reservoir means for retaining and dispersing the active ingredient(s).
- the matrix may include, but not be limited to polytheylene oxide (PolyOx®), polyvinylpyrrolidone (Kolidon®), hydroxypropyl cellulose (Klucel®), ethyl cellulose, methylcellulose, alkylcelluloses, veegums clays, alginates, PVP, alginic acid, carboxymethylcellulose calcium, microcrystalline cellulose (e.g., AvicelTM), polacrillin potassium (e.g., AmberliteTM), sodium alginate, corn starch, potato starch, pregelatnized starch, modified starch, cellulosic agents, montmorrilonite clays (e.g., bentonite), gums, agar, locust bean gum, gum karaya, pecitin, tragacanth, and other matrix formers known to those skilled in the art.
- PolyOx® polytheylene oxide
- Kolidon® polyvinylpyrrolidone
- Klucel®
- the hot-melt extruded matrix film contains a solid dispersion or solution of the active cannabinoid.
- This matrix may optionally contain a bioadhesive (such as a carbopol, polycarbophil, chitosan or others known to those skilled in the art—to further enhance the bioadhesivity of the cannabinoid itself) or a bioadhesive layer may be laminated onto the matrix film or patch containing the cannabinoid.
- an impermeable backing layer may be incorporated to insure unidirectional flow of the drug through the patient's mucosa.
- a rate controlling film or membrane may also be laminated or sprayed onto the cannabinoid-containing matrix to further control the rate of release of the actives.
- the transmucosal preparation will preferably contain a ‘penetration enhancer’ (which may also be referred to as an absorption enhancer or permeability enhancer).
- penetration enhancers may include bile salts, such as sodium deoxycholate, sodium glycodeoxycholate, sodium taurocholate and sodium glycocholate, surfactants such as sodium lauryl sulfate, polysorbate 80, laureth-9, benzalkonium chloride, cetylpyridinium chloride and polyoxyethylene monoalkyl ethers such as the BRIJ® and MYRJ® series.
- Additional penetration enhancers for inclusion in the embodiment include benzoic acids, such as sodium salicylate and methoxy salicylate, fatty acids, such as lauric acid, oleic acid, undecanoic acid and methyl oleate, fatty alcohols, such as octanol and nonanol, laurocapram, the polyols, propylene glycol and glycerin, cyclodextrins, the sulfoxides, such as dimethyl sulfoxide and dodecyl methyl sulfoxide, the terpenes, such as menthol, thymol and limonene, urea, chitosan and other natural and synthetic polymers.
- benzoic acids such as sodium salicylate and methoxy salicylate
- fatty acids such as lauric acid, oleic acid, undecanoic acid and methyl oleate
- fatty alcohols such as octanol and nonanol,
- a reservoir containing the cannabinoid and other rate controlling measures overlying an extruded matrix layer or layers, covered by an impermeable backing layer is disclosed.
- the rate controlling means particularly regulates flux, in addition to the matrix layer or layers, of the cannabinoid to the mucosa.
- the cannabinoid is dissolved in an appropriate solvent or polymer containing solution or suspension that will then be control released as the extruded matrix layer hydrates and erodes so that mucosal absorption is attained.
- the rate controlling means may comprise a nonporous or porous polymer membrane for controlling the diffusion rate of cannabinoids.
- the reservoir means may also comprise a polymer matrix material, hot-melt extruded or otherwise that suspends the cannabinoid and releases it in a controlled manner.
- the flux of the polymer matrix material may further be regulated by the rate controlling membrane.
- the present invention provides a bioadhesive system that is an effective, feasible, and convenient intra-oral drug delivery system for applying and delivering controlled dosages of canmabinoid agents through or into the oral cavity.
- This invention may also be extended to controlled drug delivery in gynecological (vaginal), nasal, sinus, and ophthalmic applications.
- Preferred processes are hot-melt extrusion or hot-melt molding which generally provide shorter and more efficient processing times to a final product, environmental advantages due to elimination of solvents in processing, better stability and increased efficiency of drug delivery to the patient.
- an admixed system and a solvent cast system may be employed.
- This invention is generally directed to an extruded single or multi-layered laminated film matrix containing the cannabinoid that can be cut or formed into almost unlimited shapes and sizes, depending on the application and dosage intended.
- Matrices of different thickness and shapes may be prepared by changing the extrusion die, varying the extrusion rate or varying the film tension between the chill-roll or take-off roll and the extruder.
- the transmucosal device film or films (in the case of co-extrusion or layering) generally comprises at least one water-soluble, water-swellable or water-insoluble thermoplastic polymer such as, but not limited to, hydroxypropylcellulose, polyethylene oxide, homopolymers and copolymers of carboxymethyl cellulose, ethylcellulose, hydroxyethyl cellulose and hydroxymethyl cellulose with a cannabinoid or multiple cannabinoids as the medicament(s).
- hydroxypropylcellulose polyethylene oxide
- homopolymers and copolymers of carboxymethyl cellulose, ethylcellulose, hydroxyethyl cellulose and hydroxymethyl cellulose with a cannabinoid or multiple cannabinoids as the medicament(s).
- the hot-melt extruded or hot-melt molded matrix may also comprise as bioadhesives such as water-soluble or water-swellable polymers derived from acrylic acid or a pharmaceutically acceptable salt thereof, such as the polyacrylic acid polymers, including carbomers, polycarbophils and/or water-soluble salts of a co-polymer of methyl vinyl ether and maleic acid or anhydride (Gantrez MS-955).
- the film can also comprise one or more pH adjusting agents, additives (such as penetration enhancers), and/or hydrophobic polymers that may render the film useful for particular transmucosal applications.
- the film is generally used for controlled delivery of cannabinoids to the patient.
- the film formulations of the invention will adhere to mucosal surfaces (oral, vaginal, etc.) when wet. This bioadhesion is enhanced by the discovered adhesive properties of the cannabinoids when incorporated into a transmucosal preparation, via hot-melt extrusion, hot-melt molding, admixing or solvent cast techniques.
- the invention includes a transmucosal preparation wherein said transmucosal preparation is made by incorporating an effective amount of a cannabinoid by solubilizing or dispersing the cannabinoid into the cannabinoid preparation.
- the preparation may be produced via hot-melt extrusion, hot-melt molding, admixing or utilizing a solvent cast technique.
- the preparation of this invention which is useful for delivering cannabinoids through the mucosal tissue may also comprise, other than stated above, additives which may make the matrix more flexible or thermoplastic.
- the transmucosal preparation can also comprise one or more pH-adjusting agents to improve stability and solubility.
- the pH modifying agents can control cannabinoid release and enhance bioadhesion.
- a pH-adjusting agent can include, by way of example and without limitation, an organic acid or base, an alpha-hydroxy acid, or a beta-hydroxy acid. Suitable agents include tartaric acid, citric acid, fumaric acid, succinic acid and others known to those of ordinary skill in the art.
- the transmucosal preparation can also comprise one or more cross-linking agents to reduce matrix erosion time, control release of the cannabinoid or enhance bioadhesion.
- a cross-linking agent can include, by way of example and without limitation, an organic acid, an alpha-hydroxy acid, or a beta-hemolytic-hydroxy acid. Suitable cross-linking agents include tartaric acid, citric acid, fumaric acid, succinic acid and others known to those of ordinary skill in the art.
- the transmucosal preparation may also contain other components that modify the extrusion, molding or casting characteristics or physical properties of the matrix.
- Such other components are well known to those of ordinary skill in the pharmaceutical sciences and include, for example, polyethylene, xylitol, sucrose, surface-active agents, others mown to those skilled in the art, and combinations thereof.
- the transmucosal preparation of the present invention can also include super-disintegrants or absorbents.
- super-disintegrants or absorbents examples include sodium starch glycolate (ExplotabTM, PrimojelTM) and croscarmellose sodium (Ac-Di-Sol®).
- absorbents include cross-linked PVP (PolyplasdoneTM XL 10), clays, alginates, corn starch, potato starch, pregelatinized starch, modified starch, cellulosic agents, montmorrilonite clays (bentonite), gums, agar, locust bean gum, gum karaya, pectin, tragacanth, and other disintegrants known to those of ordinary skill in the art.
- the transmucosal preparation can also include one or more of each of a pH buffering agent, an antioxidant, chelating agent, stabilizer, surfactant, preservative, paraben, flavor, colorant, fragrance and combinations thereof.
- pH buffering agents include alkalinizing agents, acidifying agents and salts thereof.
- a buffering agent is used to resist change in pH upon dilution or addition of acid or alkali.
- Such compounds include, by way of example and without limitation, potassium metaphosphate, potassium phosphate, monobasic sodium acetate and sodium citrate anhydrous and dihydrate, salts of inorganic or organic acids, salts of inorganic or organic bases, and others known to those of ordinary skill in the art.
- the term “acidifying agent” is intended to mean a compound used to provide acidic medium for product stability.
- Such compounds include, by way of example and without limitation, acetic acid, amino acids, citric acid, fumaric acid and alpha hydroxy acids, such as ascorbic acid, and inorganic acids such as hydrochloric acid and nitric acid and others known to those of ordinary skill in the art.
- alkalinizing agent is intended to mean a compound used to provide alkaline medium for product stability.
- Such compounds include, by way of example and without limitation, ammonia solution, ammonium carbonate, diethanolamine, monethanolamine, potassium hydroxide, sodium borate, sodium carbonate, sodium bicarbonate, sodium hydroxide, triethanolamine, and trolamine and others known to those of ordinary skill in the art.
- the transmucosal preparation of the invention can include a chelating agent.
- Suitable chelating agents include EDTA, polycarboxylic acids, polyamines, derivatives thereof, and others known to those of ordinary skill in the art.
- the transmucosal preparation of the invention can include a surfactant.
- Suitable surfactants include sucrose stearate, Vitamin E derivatives, sodium lauryl sulfate, dioctyl sodium sulfosuccinate, and others known to those of ordinary skill in the art.
- the transmucosal preparation of the invention can include a preservative.
- Preservatives include compounds used to prevent the growth of microorganisms. Suitable preservatives include, by way of example and without limitation, benzalkonium chloride, propyl paraben, methyl paraben, benzyl alcohol, cetylpridinium chloride, chlorobutanol, sorbic acid, phenol, phenylethyl alcohol, phenylmercuric nitrate and thimerosal and others known to those of ordinary skill in the art.
- flavorant As used herein, the term “flavorant”, “flavor” or “fragrance” is intended to mean a compound used to impart a pleasant flavor and often odor to a pharmaceutical preparation.
- many synthetic flavorants are also used.
- Such compounds include, by way of example and without limitation, anise oil, cinnamon oil, cocoa, menthol, orange oil, peppermint oil and vanillin and others known to those of ordinary skill in the art.
- Flavors incorporated in the composition may be chosen from synthetic flavor oils and flavoring aromatics and/or natural oils, extract from plants, leaves, flowers, fruits and so forth and combinations thereof.
- oils may include oil of wintergreen, clove oil, bay oil, anise oil, eucalyptus, thyme oil cedar leaf oil, oil of nutmeg, oil of sage, oil of bitter almonds and cassia oil.
- flavors include vanilla, citrus oils, including lemon, orange, lime and grapefruit, and fruit essences, including grape, apple, pear, peach, strawberry, raspberry, cherry, plum, apricot, and so forth.
- Flavors that have been found to be particularly useful include commercially available orange, grape, cherry, and bubble gum flavors and mixtures thereof. The amount of flavoring may depend on a number of factors, including the organoleptic effect desired.
- colorant is intended to mean a compound used to impart color to solid pharmaceutical preparations.
- Such compounds include, by way of example and without limitation, FD&C Red No. 3, FD&C Red No. 20, FD&C Yellow No. 6, FD&C Blue No. 2, D&C Green No. 5, D&C Orange No. 5, D&C Red No. 8, caramel, and ferric oxide red.
- suitable colorants include titanium dioxide and natural coloring agents such as grape extract, beet red powder, carmine, turmeric, paprika, and others known to those of ordinary skill in the art.
- antioxidant is intended to mean an agent that inhibits oxidation and thus is used to prevent the deterioration of preparations by oxidation.
- these compounds include, by way of example and without limitation, ascorbic acid, ascorbyl palnitate, butylated hydroxyanisole (BHA), butylated hydroxytoluene (B3HT), hypophophorous acid, monothioglycerol, sodium ascorbate, sodium formaldehyde sulfoxylate and sodium metabisulfate and others known to those of ordinary skill in the art.
- suitable antioxidants include, for example, vitamin C, sodium bisulfite, vitamin E and its derivatives, propyl gallate, a sulfite derivative, and others known to those of ordinary skill in the art.
- Embodiments of the transmucosal preparation that provide a controlled release of an agent may contain a release rate modifier.
- Suitable release rate modifiers include hydroxypropylcellulose (BpC), poly(ethylene oxide) (PEO), hydroxypropyl methlcellulose (HPMC), ethylcellulose, cellulosic polymers, acrylic polymers, fat, waxes, lipid, or a combination thereof
- the release rate modifier is polycarbophil, carbomer or a polysaccharide.
- the ingredients and chemicals used for the production of the transmucosal preparation used in this invention are of acceptable quality, preferably pharmaceutically acceptable quality.
- the cannabinoid-containing transmucosal preparation is homogenous and pharmaceutically acceptable.
- Example #1 was prepared by hot-melt molding.
- the Tetrahydrocannabinol (THC) was dissolved within the Polytheylene glycol 400.
- the other Inner matrix components were then mixed and heated to approximately 140° C. and homogeneously blended.
- the solubilized THC was then slowly added to the heated admixture and dispersed.
- the resulting molten matrix was then poured into a film mold to obtain a uniformly thick (approximately 1.5 mm) film after slowly cooling.
- the backing layer was adhered with 40° C. heating.
- the Outer backing ingredients were heated (90° C.), mixed and molded separately.
- Example #1 above contains the solubilizer PEG 400, which may also function as a penetration enhancer.
- An additional example may include the above formula with the bile salt penetration enhancer, sodium deoxycholate, at the 5% level.
- Drug/Chemical (% w/w) #2 #3 #4 Hydroxypropyl cellulose (Avg MW: 80,000) 15.5 11.5 3.5 Polyethylene Oxide (Avg MW: 200,000) 80.4 80.4 80.4 Vitamin E succinate 0.1 0.1 0.1 0.1 Tetrahydrocannabinol Hemiglutarate 4 8 16 (THC Pro-drug)
- Example #2-#4 were prepared via a solvent cast technique.
- the Tetrahydrocannabinol Hemiglutarrate (THC-HG) was dissolved in ethanol (10% w/w of THC-HG).
- the HPC and PEO were then admixed with the Vitamin E succinate via solvation.
- the THC-HG solution was slowly added to the polymeric dispersion.
- the resulting dispersion was added to a film forming mold and the solvent was evaporated off.
- the resulting transmucosal preparation was homogenously dispersed with the cannabinoid pro-drug.
- Example #5 and #6 were prepared using hot-melt extrusion techniques. The formulas are listed below.
- the PEO, PVP and Vitamin E TPGS were dry blended in a V-blender.
- the THC and the THC-HS were solubilized in the PEG 400 and immediately sprayed into the dry blend with continuous mixing.
- the resulting blend was then hot-melt extruded into films.
- the highest extrusion temperature was 150° C. and residence time in the barrel was approximately 2 minutes.
- the resulting transmucosal preparations were approximately 1.0 mm in thickness and both contained over 98% of the original theoretical percent of drug within the formulation.
- Drug/Chemical % w/w #5 #6 Polyethylene Oxide (Avg MW: 1,000,000) 68.0 68.0 Polyvinylpyrrolidone (Kollidon) 10.0 10.0 Polyethylene glycol (PEG 400) 11.0 11.0 Vitamin E TPGS 3.0 3.0 Tetrahydrocannabinol (THC) 8.0 — Tetrahydrocannabinol Hemisuccinate — 8.0 (THC-HS)
- FIG. 1 illustrates the results of these studies. As can be seen by the illustration, the THC-HS exhibited a more immediate release with controlled diffusion for over 22 hours.
- Example #5 (THC) demonstrated a slower release with approximately 50% theoretical drug released at 22 hours. Both formulations have clinical applications for different therapeutic objectives.
- THC is very unstable at room temperature [1] and its primary degradant is cannabinol (CBN). It has also been reported that THC instability is accelerated by ultraviolet light and heat [1]. However, the studies within this invention have demonstrated that over 98% of THC was recovered after processing the drug into mHC Transmucosal Matrix Patch (IMP) Systems [2].
- IMP Transmucosal Matrix Patch
- Hot-melt molding of four batches of the following formulations containing THC was performed.
- the TWP systems were obtained with a thickness range from 0.3 mm to 3.0 mm.
- Melt temperature for the formulas ranged from 90° C. to 140° C.
- Table I outlines the formulas used for stability study testing.
- Table II illustrates the percent drug remaining (via HPLC) in the four formulations within 24 hours post-extrusion and after 12 months. This preliminary data is encouraging in that it indicates that all four formulations have greater than 96% theoretical drug remaining after 12 months. It has recently been demonstrated that significant THC degradation does not occur until the cannabinoid is hot-melt processed at 200° C. for 20 minutes [2]. In this study, when Tetrahydrocannabinol was incorporated into cellulosic (Kucel®) matrix films processed at 120, 160 and 200° C. (for 20 minutes), THC degradation within the hot-mold matrix was found to be 1.8, 2.3 and 4.3%, respectively.
- Bioadhesive experiments were conducted on the THC Pro-drug formulation systems using a TA.XT2i Texture Analyzer equipped with Texture ExpertTM software to produce force-deflection profiles.
- the substrate used for bioadhesion testing was rabbit intestinal mucosa All formulations were prepared by an ethanol solvent cast method.
- TMP 8% & TMP 16% attained a peak force of 2.5 N and 3.4 N, respectively.
- the peak bioadhesive force of both THC incorporated systems increased statistically (p ⁇ 0.05) with an increase in percentage THC compared to the control (0% TMP, 1.9N).
- FIG. 2 illustrates these bioadhesion results.
- Table III represents the formulations for the transmucosal matrices.
- Marijuana and Medicine Assessing the Science Base, ed. J. E. Joy, S. J. Watson, and J. A. Benson. 1999, Washington, D.C.: National Academy Press.
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Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/516,188 US20060257463A1 (en) | 2002-05-31 | 2003-05-30 | Transmucosal delivery of cannabinoids |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US38473502P | 2002-05-31 | 2002-05-31 | |
US10/516,188 US20060257463A1 (en) | 2002-05-31 | 2003-05-30 | Transmucosal delivery of cannabinoids |
PCT/US2003/016812 WO2003101357A1 (fr) | 2002-05-31 | 2003-05-30 | Administration par voie transmuqueuse de cannabinoides |
Publications (1)
Publication Number | Publication Date |
---|---|
US20060257463A1 true US20060257463A1 (en) | 2006-11-16 |
Family
ID=29712086
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/516,188 Abandoned US20060257463A1 (en) | 2002-05-31 | 2003-05-30 | Transmucosal delivery of cannabinoids |
Country Status (6)
Country | Link |
---|---|
US (1) | US20060257463A1 (fr) |
EP (1) | EP1539069A4 (fr) |
AU (1) | AU2003240824B9 (fr) |
CA (1) | CA2487882A1 (fr) |
MX (1) | MXPA04011808A (fr) |
WO (1) | WO2003101357A1 (fr) |
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Also Published As
Publication number | Publication date |
---|---|
EP1539069A1 (fr) | 2005-06-15 |
CA2487882A1 (fr) | 2003-12-11 |
WO2003101357A9 (fr) | 2004-07-15 |
AU2003240824A1 (en) | 2003-12-19 |
MXPA04011808A (es) | 2005-09-12 |
WO2003101357A1 (fr) | 2003-12-11 |
AU2003240824B9 (en) | 2008-09-25 |
AU2003240824B2 (en) | 2008-08-07 |
EP1539069A4 (fr) | 2007-11-14 |
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